One of the main themes is the pursuit of revenge. The main character has his own reasons for wanting to get stronger, often related to avenging something or someone. Also, friendship and loyalty play important roles. As he progresses in his martial journey, he forms bonds with other characters and these relationships are integral to the story. There are also elements of exploration as he travels through different regions in the martial world to gain power and knowledge.
The theme of destiny is quite prominent. The 'dragon martial emperor' seems to be fated for great things in the martial world. He has to fight against the odds and against those who would oppose his rise. Another theme is the struggle between good and evil. There are various characters representing different moral alignments, and the main character has to navigate this complex web of relationships while staying true to his own beliefs and goals.
Power and self - improvement are main themes. The protagonist is constantly striving to become stronger in the martial arts world.
I think the theme of self - discovery is also there. As the character progresses in the martial arts journey, they might discover their true potential, their purpose in this world of martial emperors and gods. Also, friendship and rivalry play a role. There could be comrades who help the main character along the way and rivals who push them to become better.
There is probably a theme of duality, as suggested by 'dark and light' in the title. It could mean the struggle between good and evil, or different aspects of martial power.
Power is a main theme. The protagonist is constantly striving to gain more power in the martial world of light and dark. Another theme is revenge. He may have some scores to settle which drives his actions.
Power and growth. The protagonist constantly strives to become more powerful and overcome his limitations.
In the 'dragon martial emperor novel', the main character is surely someone with great potential in martial arts. There could be his friends or comrades who support him in his quests. Maybe there are also antagonists, like powerful martial artists from rival sects or those with evil intentions who try to stop him from achieving his goal of becoming the dragon martial emperor. There may also be a love interest for the main character that adds an emotional aspect to the story.
I'm not entirely sure about all the details of the plot as I haven't read every part. But generally, it likely involves a protagonist in a world where martial arts are supreme. He probably has to face various challenges, fight powerful enemies, and strive to become the most powerful martial emperor. Maybe there are also elements like training in special martial arts techniques, exploring mysterious places, and forming alliances or rivalries with other characters.
Power is likely a main theme. Since it has a dragon emperor, power dynamics - how one gains, maintains, and uses power - could be central.
Since I haven't read the novel, I can't say for sure. But I would assume the martial emperor with dragon blood is one of the main characters.
Another theme might be self - discovery. As the characters progress through their martial arts journey, they also learn more about themselves, their limits, and their true desires.
One of the main themes is probably power. The sword of the emperor is likely a symbol of great power, and the story may revolve around characters seeking or trying to control this power. Another theme could be loyalty, as characters might be loyal to the emperor or the idea of the imperial power associated with the sword.